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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 18 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.63 + 34 =
  2. 2.82 + 39 =
  3. 3.57 + 74 =
  4. 4.88 + 24 =
  5. 5.38 + 17 =
  6. 6.73 + 81 =
  7. 7.27 + 51 =
  8. 8.43 + 39 =
  9. 9.68 + 61 =
  10. 10.87 + 57 =
  11. 11.22 + 31 =
  12. 12.51 + 28 =
  13. 13.41 + 21 =
  14. 14.84 + 24 =
  15. 15.33 + 77 =
  16. 16.40 + 29 =
  17. 17.48 + 66 =
  18. 18.25 + 82 =
  19. 19.41 + 81 =
  20. 20.48 + 37 =
  21. 21.28 + 63 =
  22. 22.56 + 29 =
  23. 23.86 + 31 =
  24. 24.41 + 62 =
  25. 25.52 + 31 =
  26. 26.62 + 21 =
  27. 27.63 + 41 =
  28. 28.32 + 49 =
  29. 29.74 + 66 =
  30. 30.77 + 44 =
  31. 31.31 + 32 =
  32. 32.59 + 41 =
  33. 33.58 + 76 =
  34. 34.70 + 21 =
  35. 35.87 + 36 =
  36. 36.89 + 56 =
  37. 37.44 + 75 =
  38. 38.35 + 65 =
  39. 39.66 + 23 =
  40. 40.89 + 31 =

Answer key

  1. 97
  2. 121
  3. 131
  4. 112
  5. 55
  6. 154
  7. 78
  8. 82
  9. 129
  10. 144
  11. 53
  12. 79
  13. 62
  14. 108
  15. 110
  16. 69
  17. 114
  18. 107
  19. 122
  20. 85
  21. 91
  22. 85
  23. 117
  24. 103
  25. 83
  26. 83
  27. 104
  28. 81
  29. 140
  30. 121
  31. 63
  32. 100
  33. 134
  34. 91
  35. 123
  36. 145
  37. 119
  38. 100
  39. 89
  40. 120

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